Lecture
This lecture covers the limitations of ohmic heating in plasma and the necessity for additional heating methods, focusing on neutral beam injection. It explains the processes involved in plasma heating, the radiation barrier, and the power requirements for different heating methods. The lecture also delves into the components and processes of neutral beam injectors, the interaction between beam and plasma, and the importance of neutralization efficiency. It concludes with examples of present neutral beam injection systems and ongoing research for optimizing neutral beam injection for future fusion reactors.